An image reading apparatus includes a platen on which a document is to be placed, an image sensor configured to read an image of the document on the platen, an opening/closing member configured to cover and uncover the platen, a document pressing layer disposed on a surface of the opening/closing member and configured to press the document on the plate when the opening/closing member covers the platen, elastic layers located between the document pressing layer and the opening/closing member and spaced apart from each other on a surface of the document pressing layer, and connection layers connecting the elastic layers to the opening/closing member. An area of the elastic layer is larger than an area of the connection layer.
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2. The image reading apparatus according to claim 1, wherein the elastic layers protrude from second layers the over entire perimeters of the second layers with the second layers being disposed on the elastic layers.
An image reading apparatus includes a contact glass for placing a document, a light source for illuminating the document, and an image sensor for capturing the reflected light to generate an image. The apparatus has a pressing mechanism with elastic layers and second layers. The elastic layers are positioned to support the second layers, which are disposed directly on top of them. The elastic layers protrude outward from the second layers along their entire perimeters, ensuring full contact with the document. This design helps maintain uniform pressure across the document surface, reducing distortions and improving image quality during scanning. The pressing mechanism ensures consistent contact between the document and the contact glass, minimizing gaps that could lead to uneven lighting or focus issues. The elastic layers provide flexibility, while the second layers enhance structural stability. This configuration is particularly useful in high-precision scanning applications where document flatness and image clarity are critical. The apparatus may be used in scanners, copiers, or multifunction devices where accurate image reproduction is required. The protruding elastic layers ensure that the pressing mechanism adapts to varying document thicknesses while maintaining optimal contact. This design improves reliability and performance in automated document handling systems.
5. The image reading apparatus according to claim 1, wherein the first layer includes, in this order from the platen to the platen to the document feeder in a thickness of the document, a mat to be in contact with a document, a leveling elastic member attached to the mat to eliminate irregularities, and a plate layer attached to the leveling elastic member.
This invention relates to an image reading apparatus designed to improve document feeding and scanning quality. The apparatus addresses the problem of irregularities in document surfaces, which can cause uneven lighting, focus issues, and image distortion during scanning. The solution involves a multi-layered structure in the document platen area to ensure consistent document positioning and flatness. The apparatus includes a first layer positioned between the platen and the document feeder. This layer consists of three components arranged sequentially from the platen side to the document feeder side. The first component is a mat that directly contacts the document, providing a smooth surface for scanning. The second component is a leveling elastic member attached to the mat, which compensates for any irregularities in the document's surface by applying even pressure. The third component is a plate layer attached to the leveling elastic member, providing structural support and further ensuring the document remains flat during scanning. This layered design helps maintain optimal imaging conditions by minimizing surface variations, improving image clarity, and reducing scanning errors. The elastic member's flexibility allows it to adapt to different document thicknesses while maintaining consistent pressure, enhancing the apparatus's versatility for various document types.
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July 9, 2020
October 4, 2022
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